package c4.demo1.Example3;
class Animal{
    void shout(){
        System.out.println("动物发出叫声");
    }
}
//定义Dog类继承Animal类
class Dog extends Animal{
    //重写父类Animal中的shout()方法
    void shout (){
        System.out.println("汪汪汪‥‥‥");
    }
}
public class example3 {
    public static void main(String[] args) {
        Dog dog =new Dog();
        dog.shout();
    }
}